PerTronix Dougs Headers D3321 - Manual (Page 2)

Part No. 0110-003049
Page 2 of 3
8-18-2011 DSL
8. Replace the spark plugs finger tight so debris will not get into the cylinders while
cleaning the head surface. We recommend the use of a gasket scraper, wire brush,
and sanding block to adequately clean the surface.
9. After cleaning is complete remove the spark plugs again.
10. Modify the A/C bracket as shown in Figure 1, Page 3.
11. Remove the temperature sensor and reinstall using a 45º fitting to point it downward.
12. Note: For adequate clearance it may be necessary to trim ear off of starter.
ASSEMBLY
1. Apply a THIN film of Ultra Copper Hi-Temp Sensor-Safe Silicone Sealer to each side of
the header gaskets and stick the gaskets to the header flanges. Masking tape can be
used to help hold the gasket to the header.
2. Remove left side motor mount bolt and jack motor up approximately 1- 1/2” – 3”.
CAUTION: Be sure to place a board between the oil pan and the jack.
3. Starting from below, work header up through chassis into position but do not install any
bolts yet.
4. Lower the motor and check for header clearance. Replace motor mount bolt.
5. Using the supplied header bolts and lock-washers, apply a small amount of anti-seize
to the bolts and start the most restrictive bolts first. Tighten to a final torque of 35 ft. lbs.
6. Install the spark plugs and attach the appropriate wire to the spark plug and reattach
the spark plug wire looms. It may be necessary to reroute wires to clear the headers.
7. Remove right side motor mount bolt and jack motor up approximately 1- 1/2” – 3”.
CAUTION: Be sure to place a board between the oil pan and the jack.
8. Starting from below, work header (without R-4 headpipe) up through chassis into
position but do not install any bolts yet.
9. Lower the motor and check for header clearance.
10. Apply a small amount of anti-seize to 2 stock bolts. Install them in the front 2 bolt holes
with the furnished spacers to hold brackets in the stock location.
11. In the remaining bolt holes, use the supplied header bolts and lock-washers. Apply a
small amount of anti-seize to the bolts and start the most restrictive bolts first but do not
tighten.
12. Replace motor mount bolt and fan shroud bolts.
13. Reinstall the starter and install the R-4 headpipe in slip tube on main body of header.
14. Tighten header bolts to a final torque of 35 ft. lbs.
15. Reinstall the dipstick tube, clutch linkage and the alternator.
16. Install the spark plugs and attach the appropriate wire to the spark plug and reattach
the spark plug wire looms. It may be necessary to reroute wires to clear the headers.
17. Connect the negative battery cable.
Note 1:
To retain oxygen sensor, purchase Doug’s Reducer Part No. H7233.
START THE ENGINE
Start the engine and allow it to warm up to operating temperature. Check for any unusual
noises or exhaust leaks. If every thing is OK, stop the engine and tighten all bolts while
the engine is still warm.